Mechanical pencil



FIG. 1 is a perspective view of the front, bottom and left side of a mechanical pencil showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a bottom side view thereof, a top view being a mirror image thereof. 

The ornamental design for a mechanical pencil, as shown and described. 